Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Weight Loss Timeline Calculator
Calculate the number of weeks needed to reach a target weight given current weight, goal weight, and planned weekly loss rate. Use it to set realistic timelines and avoid the disappointment of expectations mismatched with sustainable rates.
BMR / TDEE Calculator
Estimate your daily calorie needs using the revised Harris-Benedict equation, then adjust for activity to get your Total Daily Energy Expenditure (TDEE) — the rough number of calories you burn in 24 hours when you eat a maintenance diet. Enter your weight in kilograms, height in centimetres, age, biological sex, and an activity multiplier (sedentary 1.2, lightly active 1.375, moderately active 1.55, very active 1.725, extremely active 1.9). The result is what most nutrition guides call your "maintenance calories" — a starting point for designing a deficit (to lose weight), a surplus (to gain muscle), or a recomposition plan.
Key differences
| Weight Loss Timeline Calculator | BMR / TDEE Calculator | |
|---|---|---|
| Category | Weight Loss | Health |
| Inputs required | 3 | 5 |
| Result | Time to Reach Goal (weeks) | Daily Calorie Needs (calories) |
| What it does | Calculate the number of weeks needed to reach a target weight given current weight, goal weight, and planned weekly loss rate. Use it to set realistic timelines and avoid the disappointment of expectations mismatched with sustainable rates. | Estimate your daily calorie needs using the revised Harris-Benedict equation, then adjust for activity to get your Total Daily Energy Expenditure (TDEE) — the rough number of calories you burn in 24 hours when you eat a maintenance diet. Enter your weight in kilograms, height in centimetres, age, biological sex, and an activity multiplier (sedentary 1.2, lightly active 1.375, moderately active 1.55, very active 1.725, extremely active 1.9). The result is what most nutrition guides call your "maintenance calories" — a starting point for designing a deficit (to lose weight), a surplus (to gain muscle), or a recomposition plan. |